Created for the International Geophysical Year of 1957–1958, the Jaeger-LeCoultre Geophysic Chronometer ref. E168 is one of the manufacture’s most important post-war watches. The International Geophysical Year brought scientists from around the world together for an unprecedented programme of research encompassing the polar regions, oceans, atmosphere and space, coinciding with the launch of Sputnik 1 and the beginning of the Space Age. Jaeger-LeCoultre responded with a watch conceived specifically for scientists and explorers: precise, water resistant and capable of operating in environments where magnetic fields could seriously compromise an ordinary mechanical movement.

Introduced in 1958 and produced in relatively small numbers, the Geophysic combined an approximately 35mm case with a soft-iron inner structure designed to provide protection against magnetic fields of up to 600 gauss. At its heart was the manually wound calibre P478/BWSbr, a chronometer-grade movement developed specifically for demanding precision applications. This stainless steel example retains the purposeful simplicity that makes the original Geophysic so compelling, with a light-coloured non-luminous dial, applied indexes and Arabic numerals at 12 and 6. Far more than simply a mid-century dress watch, the E168 represents Jaeger-LeCoultre applying its technical expertise to the scientific ambitions of its age.

Watch is in overall very good condition. The steel case shows scratches and small nicks, as expected of a watch of this vintage. The dodecagonal case back shows surface scratches. The original winding crown is present and has some small dings. The white dial has aged to a rich cream hue with some surface marks, primarily visible along the edge. There is a blister on the dial that can be seen at the 18 minute marker edge. The hands show some spotting. It is fitted with a new brown leather strap and steel pin buckle.